Self-adaptive oscillation suppression device, multi-point layout cooperative suppression system and multi-point layout cooperative suppression method

Abstract

The invention provides a self-adaptive oscillation suppression device and a multi-point layout cooperative suppression system and method, and the method can collect the three-phase AC voltage, three-phase AC current and active power of a node through an equipment operation layer, and calculate the oscillation characteristic quantity of the node and the energy flow power of the node at an oscillation dominant frequency through a data processing layer. And the oscillation property of the node is determined through the application service layer, and oscillation suppression is carried out on the node through the equipment operation layer. The sensing range of the self-adaptive oscillation suppression device can be expanded in the oscillation generation process, online self-adaptive suppression of oscillation is achieved, and safe and stable operation of a power system can be guaranteed. The multi-point layout collaborative suppression system provided by the invention integrates online monitoring, multi-point layout, collaborative suppression and auxiliary optimization, realizes collaborative suppression of regional oscillation, improves the global impedance regulation and control capability of a power grid, realizes global online precise suppression of oscillation, and improves the adaptability of a power system to oscillation tolerance.

Description

Technical Field

[0001] The present application relates to the technical field of power system automation, and in particular to an adaptive oscillation suppression device, a multi-point layout collaborative suppression system and method. Background Art

[0002] The stability of the power system specifically refers to the ability of the power system to return to a balanced operating state after being disturbed by an oscillation. The destruction of the stability of the power system may cause power outages for a large number of users, with extremely serious consequences. Therefore, it is necessary to improve the stability of the power system to ensure the safe and reliable operation of the power system.

[0003] Impedance analysis and control methods are usually used to solve the oscillation problem of power systems. However, due to the interactive coupling between different types of equipment and power systems at multiple time scales, related technologies achieve oscillation suppression of power systems by optimizing system parameters and increasing the positive damping of substations. However, since the suppression method provided by related technologies is offline suppression, and the suppression time node is after the oscillation occurs, the safe and stable operation of the power system cannot be guaranteed. Summary of the invention

[0004] In order to solve the problem that the prior art cannot ensure the safe and stable operation of the power system, the present application provides an adaptive oscillation suppression device, which may include a device operation layer, a data processing layer and an application service layer.

[0005] The device operation layer is used to collect the three-phase AC voltage, three-phase AC current and active power of the node.

[0006] The data processing layer is used to calculate the oscillation characteristic quantity of the node and the energy flow power of the node at the oscillation dominant frequency according to the three-phase AC voltage, three-phase AC current and active power of the node.

[0007] The application service layer is used to determine the oscillation properties of the node according to the energy flow power of the node at the oscillation dominant frequency.

[0008] The device operation layer is also used to suppress the oscillation of the node according to the oscillation characteristic quantity and the oscillation property of the node.

[0009] In some possible implementations, the data processing layer is specifically used for:

[0010] The oscillation characteristic quantity is calculated by using the Prony algorithm, wherein the oscillation characteristic quantity includes at least one of the oscillation frequency, amplitude, phase or damping ratio of the active power.

[0011] In some other possible implementations, the data processing layer is specifically used for:

[0012] Perform Park transformation on the three-phase AC voltage and the three-phase AC current to obtain the voltage component and the current component in the two-phase rotating coordinate system.

[0013] The transient energy flow of each line in the node is calculated based on the voltage component and current component in the two-phase rotating coordinate system.

[0014] The energy flow power of the node at the dominant frequency of oscillation is calculated based on the transient energy flow.

[0015] Optionally, the transient energy flow of each line in the node satisfies:

[0016]

[0017] Where W represents the transient energy flow of each line in the node, u d represents the d-axis voltage component in the two-phase rotating coordinate system, u q represents the q-axis voltage component in the two-phase rotating coordinate system, i d represents the d-axis current component in the two-phase rotating coordinate system, i q represents the q-axis current component in the two-phase rotating coordinate system, ω0 represents the angular frequency of the power grid, and L g Represents the grid side inductance.

[0018] In yet another possible implementation, the data processing layer is specifically used for:

[0019] The transient energy flows of each line in the node are superimposed to obtain the energy flow power of the node at the dominant frequency of oscillation.

[0020] Exemplarily, the application service layer is specifically used for:

[0021] The energy flow power of the node at the dominant frequency of oscillation is positive, and the oscillation nature of the node is determined to be an oscillation source node.

[0022] The energy flow power of the node at the dominant frequency of oscillation presents alternating positive and negative, and the oscillation property of the node is determined to be an oscillation propagation path node.

[0023] The energy flow power of the node at the dominant frequency of oscillation is negative, and the oscillation nature of the node is determined to be an oscillation receiving node.

[0024] In yet another possible implementation, the device operation layer is specifically used for:

[0025] For the oscillation source node, oscillation of the oscillation source node is suppressed according to the maximum output of the adaptive oscillation suppression device.

[0026] For the nodes on the oscillation propagation path, oscillation suppression is performed on the nodes on the oscillation propagation path according to the positive and negative fluctuation amplitudes of the energy flow power of the nodes at the oscillation dominant frequency.

[0027] For the oscillation receiving node, oscillation suppression is performed on the oscillation receiving node according to the oscillation characteristic amount.

[0028] On the other hand, the present application also provides a multi-point layout collaborative suppression system, including a station-side collaborative suppression system and a plurality of the adaptive oscillation suppression devices introduced above.

[0029] Each of the multiple adaptive oscillation suppression devices is used to: collect the three-phase AC voltage, three-phase AC current and active power of the node, and calculate the oscillation characteristic quantity of the node and the energy flow power of the node at the dominant frequency of the oscillation based on the three-phase AC voltage, three-phase AC current and active power of the node.

[0030] The station-side cooperative suppression system is used to: receive the oscillation characteristic quantity of the node and the energy flow power of the node at the oscillation dominant frequency, and send them to other adaptive oscillation suppression devices except itself among multiple adaptive oscillation suppression devices.

[0031] Each adaptive oscillation suppression device is also used to: determine the oscillation property of the node according to the energy flow power of the node at the oscillation dominant frequency, and suppress the oscillation of the node according to the oscillation characteristic quantity of the node and the oscillation property of the node.

[0032] Optionally, the station-side collaborative suppression system is also used to: calculate the voltage disturbance of the node according to the three-phase AC voltage, calculate the current disturbance of the node according to the three-phase AC current, calculate the node power fluctuation according to the active power of the node, and calculate the power factor fluctuation according to the three-phase AC voltage and the three-phase AC current. The oscillation risk assessment value is calculated using the principal component analysis method based on the voltage disturbance, current disturbance, power fluctuation and power factor fluctuation. When the oscillation risk assessment value is greater than or equal to the preset assessment threshold value, an oscillation risk warning is issued, and an auxiliary optimization strategy is issued to the adaptive oscillation suppression device.

[0033] The adaptive oscillation suppression device is also used to: adjust its own adaptive parameters according to the optimization auxiliary strategy, and suppress oscillation of the node according to the adjusted adaptive parameters.

[0034] On the other hand, the present application also provides a multi-point layout collaborative suppression method, including:

[0035] Each adaptive oscillation suppression device collects the three-phase AC voltage, three-phase AC current and active power of the node, and calculates the oscillation characteristic quantity of the node and the energy flow power of the node at the dominant frequency of the oscillation based on the three-phase AC voltage, three-phase AC current and active power of the node.

[0036] The station-side cooperative suppression system receives the oscillation characteristic quantity of the node and the energy flow power of the node at the oscillation dominant frequency, and sends them to other adaptive oscillation suppression devices except itself among the multiple adaptive oscillation suppression devices.

[0037] Each adaptive oscillation suppression device determines the oscillation property of the node according to the energy flow power of the node at the oscillation dominant frequency, and suppresses the oscillation of the node according to the oscillation characteristic quantity of the node and the oscillation property of the node.

[0038] Optionally, the inhibition method provided by the present application also includes:

[0039] The station-side collaborative suppression system calculates the voltage disturbance of the node based on the three-phase AC voltage, calculates the current disturbance of the node based on the three-phase AC current, calculates the node power fluctuation based on the active power of the node, and calculates the power factor fluctuation based on the three-phase AC voltage and the three-phase AC current. The principal component analysis method is used to calculate the oscillation risk assessment value based on the voltage disturbance, current disturbance, power fluctuation and power factor fluctuation. When the oscillation risk assessment value is greater than or equal to the preset assessment threshold value, an oscillation risk warning is issued, and an auxiliary optimization strategy is issued to the adaptive oscillation suppression device.

[0040] The adaptive oscillation suppression device adjusts its own adaptive parameters according to the optimization auxiliary strategy, and suppresses the oscillation of the node according to the adjusted adaptive parameters.

[0041] Compared with the prior art, the beneficial effects of this application are:

[0042] The adaptive oscillation suppression device provided by the present application can collect the three-phase AC voltage, three-phase AC current and active power of the node through the device operation layer, calculate the oscillation characteristic quantity of the node and the energy flow power of the node at the dominant frequency of the oscillation through the data processing layer, determine the oscillation property of the node through the application service layer, and suppress the oscillation of the node through the device operation layer. Since the three-phase AC voltage, three-phase AC current and active power of the node are the actual data of the node, the present application can expand the perception range of the adaptive oscillation suppression device during the oscillation process, realize the online adaptive suppression of the oscillation, and ensure the safe and stable operation of the power system.

[0043] The multi-point layout collaborative suppression system provided in the present application includes a station-end collaborative suppression system and multiple interconnected adaptive oscillation suppression devices, that is, it integrates online monitoring, multi-point layout, collaborative suppression and auxiliary optimization, realizes the collaborative suppression of regional oscillations, improves the global impedance control capability of the power grid, realizes global online precise suppression of oscillations, and improves the adaptability of the power system to oscillation tolerance. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the present application or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0045] Figure 1 A schematic structural diagram of an adaptive oscillation suppression device in an embodiment of the present application;

[0046] Figure 2 A schematic structural diagram of a multi-point layout collaborative suppression system in an embodiment of the present application;

[0047] Figure 3 A schematic flowchart of a multi-point layout collaborative suppression method in an embodiment of the present application. DETAILED DESCRIPTION

[0048] The technical solution in this application will be described below in conjunction with the accompanying drawings.

[0049] The terms "first", "second", etc. in the specification embodiments, claims, and drawings of the present application are only used for the purpose of distinguishing descriptions, and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating or implying order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, including a series of steps or units. The method, system, product, or device is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products, or devices.

[0050] It should be understood that in the present application, "at least one (item)" means one or more, and "plurality" means two or more. "And / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0051] The present application embodiment provides an adaptive oscillation suppression device, such as Figure 1The adaptive oscillation suppression device 100 comprises a device operation layer 10 , a data processing layer 20 and an application service layer 30 .

[0052] The device operation layer 10 is used to collect the three-phase AC voltage, three-phase AC current and active power of the node.

[0053] The data processing layer 20 is used to calculate the oscillation characteristic quantity of the node and the energy flow power of the node at the oscillation dominant frequency according to the three-phase AC voltage, three-phase AC current and active power of the node.

[0054] The application service layer 30 is used to determine the oscillation property of the node according to the energy flow power of the node at the oscillation dominant frequency.

[0055] The device operation layer 10 is also used to suppress the oscillation of the node according to the oscillation characteristic quantity of the node and the oscillation property of the node.

[0056] In some possible implementations, the data processing layer 20 is specifically used for:

[0057] The oscillation characteristic quantity is calculated by using the Prony algorithm, wherein the oscillation characteristic quantity includes at least one of the oscillation frequency, amplitude, phase or damping ratio of the active power.

[0058] In some other possible implementations, the data processing layer 20 is specifically used for:

[0059] Perform Park transformation on the three-phase AC voltage and the three-phase AC current to obtain the voltage component and the current component in the two-phase rotating coordinate system.

[0060] The transient energy flow of each line in the node is calculated based on the voltage component and current component in the two-phase rotating coordinate system.

[0061] The energy flow power of the node at the dominant frequency of oscillation is calculated based on the transient energy flow.

[0062] Optionally, the transient energy flow of each line in the node satisfies:

[0063]

[0064] Where W represents the transient energy flow of each line in the node, u d represents the d-axis voltage component in the two-phase rotating coordinate system, u q represents the q-axis voltage component in the two-phase rotating coordinate system, i d represents the d-axis current component in the two-phase rotating coordinate system, i q represents the q-axis current component in the two-phase rotating coordinate system, ω0 represents the angular frequency of the power grid, and L g Represents the grid side inductance.

[0065] Optionally, the oscillation property of the node may be an oscillation source node, an oscillation propagation path node, or an oscillation receiving node.

[0066] In yet another possible implementation, the data processing layer 20 is specifically configured to:

[0067] The transient energy flows of each line in the node are superimposed to obtain the energy flow power of the node at the dominant frequency of oscillation.

[0068] Exemplarily, the application service layer is specifically used for:

[0069] The energy flow power of the node at the dominant oscillation frequency is positive, indicating that the node emits energy, and the oscillation nature of the node can be determined as an oscillation source node. If there are multiple oscillation source nodes, the point with the maximum energy flow power is the main oscillation source node.

[0070] The energy flow power of the node at the dominant frequency of oscillation is alternating between positive and negative, and the oscillation nature of the node is determined to be an oscillation propagation path node. If there are multiple oscillation propagation path nodes, the positive and negative fluctuation amplitudes of the energy flow power are used to determine whether there is an amplification effect in the oscillation propagation.

[0071] The energy flow power of the node at the dominant frequency of oscillation is negative, indicating that the node receives energy, and the oscillation nature of the node is determined to be an oscillation receiving node.

[0072] In another possible implementation, the device operation layer 10 is specifically used for:

[0073] For the oscillation source node, the oscillation source node is oscillated according to the maximum output of the adaptive oscillation suppression device. That is, the device operation layer 10 adjusts the broadband oscillation suppression priority setting to the highest state, and fully realizes broadband oscillation suppression.

[0074] For the oscillation propagation path nodes, oscillation suppression is performed on the oscillation propagation path nodes according to the positive and negative fluctuation amplitudes of the energy flow power of the nodes at the oscillation dominant frequency. That is, the device operation layer 10 adjusts the priority of broadband oscillation suppression according to the positive and negative fluctuation amplitudes of the energy flow power to achieve oscillation suppression.

[0075] For the oscillation receiving node, oscillation suppression is performed on the oscillation receiving node according to the oscillation characteristic quantity. That is, the device operation layer 10 may not adjust the broadband oscillation suppression priority, and perform oscillation suppression according to the previous adaptive strategy.

[0076] Optionally, the device operation layer 10 may be composed of a main body and monitoring sensors deployed on the main body. The monitoring sensors are mainly used to collect the three-phase AC voltage, three-phase AC current and active power of the node, and transmit the collected data to the data processing layer 20 using internal optical fibers.

[0077] The data processing layer 20 is composed of edge node devices, routers, etc., and realizes local data storage, computing and processing, uploading of perception data, and issuing of control commands. The data processing layer 20 has networking capabilities, can obtain relevant data sent and transmitted by other node devices in the data network, has certain recognition and judgment capabilities for oscillations in the power system, and has suppression and control capabilities for local single-node broadband oscillations.

[0078] The application service layer 30 can collect data and other relevant information uploaded by the data processing layer 20 in the device network, and make judgments and analyses on the oscillation development trend.

[0079] The present application also provides a multi-point layout cooperative suppression system, which can be used to cooperatively suppress broadband oscillations. Figure 2 As shown, the multi-point layout coordinated suppression system 1000 includes a station-side coordinated suppression system 200 and a plurality of the above-mentioned adaptive oscillation suppression devices 100 .

[0080] Each adaptive oscillation suppression device 100 in the multiple adaptive oscillation suppression devices is used to: collect the three-phase AC voltage, three-phase AC current and active power of the node, and calculate the oscillation characteristic quantity of the node and the energy flow power of the node at the dominant frequency of the oscillation based on the three-phase AC voltage, three-phase AC current and active power of the node.

[0081] The station-side cooperative suppression system 200 is used to receive the oscillation characteristic quantity of the node and the energy flow power of the node at the oscillation dominant frequency, and transmit them to other adaptive oscillation suppression devices among the multiple adaptive oscillation suppression devices except itself.

[0082] Each adaptive oscillation suppression device 100 is further used to determine the oscillation property of the node according to the energy flow power of the node at the dominant oscillation frequency, and to suppress the oscillation of the node according to the oscillation characteristic quantity of the node and the oscillation property of the node.

[0083] Optionally, the station-side collaborative suppression system 200 is also used to: calculate the voltage disturbance amount of the node according to the three-phase AC voltage, calculate the current disturbance amount of the node according to the three-phase AC current, calculate the node power fluctuation amount according to the active power of the node, and calculate the power factor fluctuation amount according to the three-phase AC voltage and the three-phase AC current. According to the voltage disturbance amount, the current disturbance amount, the power fluctuation amount and the power factor fluctuation amount, the principal component analysis method is used to calculate the oscillation risk assessment value. When the oscillation risk assessment value is greater than or equal to the preset assessment threshold value, an oscillation risk warning is issued, and an auxiliary optimization strategy is issued to the adaptive oscillation suppression device.

[0084] The adaptive oscillation suppression device 100 is further used to adjust its own adaptive parameters according to the optimization auxiliary strategy, and suppress oscillation of the node according to the adjusted adaptive parameters.

[0085] Optionally, the application service layer 30 in the adaptive oscillation suppression device 100 can receive the auxiliary optimization strategy issued by the station-side collaborative suppression system 200, and adjust the adaptive strategy according to the auxiliary optimization strategy. The data processing layer 20 in the adaptive oscillation suppression device 100 can adjust the adaptive parameters according to the adaptive strategy and transmit them to the device operation layer 10. The device operation layer 10 executes a new suppression strategy according to the adjusted adaptive parameters.

[0086] Exemplarily, the adaptive oscillation suppression device 100 can be deployed at a node such as a substation, and the station-side cooperative suppression system 200 can be deployed at a collection station, etc. Figure 2 Different adaptive oscillation suppression devices 100 can be interconnected to achieve coordinated suppression of oscillations.

[0087] The station-side coordinated suppression system 200 may include a front-end data receiving device and a station-side server, which are used to collect, process, and judge the evolution trend of regional power grid oscillation, and realize the evaluation of regional power grid oscillation and global auxiliary coordination.

[0088] The present application also provides a multi-point layout collaborative suppression method. Figure 3 As shown, the synergistic inhibition method 2000 may include the following steps:

[0089] Step S1: Each adaptive oscillation suppression device collects the three-phase AC voltage, three-phase AC current and active power of the node, and calculates the oscillation characteristic quantity of the node and the energy flow power of the node at the dominant frequency of the oscillation according to the three-phase AC voltage, three-phase AC current and active power of the node.

[0090] Step S2: the station-side cooperative suppression system receives the oscillation characteristic quantity of the node and the energy flow power of the node at the oscillation dominant frequency, and sends them to other adaptive oscillation suppression devices among the multiple adaptive oscillation suppression devices except itself.

[0091] Step S3: Each adaptive oscillation suppression device determines the oscillation property of the node according to the energy flow power of the node at the dominant oscillation frequency, and suppresses the oscillation of the node according to the oscillation characteristic quantity of the node and the oscillation property of the node.

[0092] Optionally, the suppression method provided in the embodiment of the present application also includes: the station-side collaborative suppression system acquires oscillation data, and determines whether oscillation occurs in the power system based on the oscillation data.

[0093] Exemplarily, the inhibition method provided in the embodiment of the present application also includes:

[0094] The station-side collaborative suppression system calculates the voltage disturbance of the node based on the three-phase AC voltage, calculates the current disturbance of the node based on the three-phase AC current, calculates the node power fluctuation based on the active power of the node, and calculates the power factor fluctuation based on the three-phase AC voltage and the three-phase AC current. The principal component analysis method is used to calculate the oscillation risk assessment value based on the voltage disturbance, current disturbance, power fluctuation and power factor fluctuation. When the oscillation risk assessment value is greater than or equal to the preset assessment threshold value, an oscillation risk warning is issued, and an auxiliary optimization strategy is issued to the adaptive oscillation suppression device.

[0095] The adaptive oscillation suppression device adjusts its own adaptive parameters according to the optimization auxiliary strategy, and suppresses the oscillation of the node according to the adjusted adaptive parameters.

[0096] That is to say, when the adaptive oscillation suppression device has a poor oscillation suppression effect, the station-side collaborative suppression system can send an auxiliary optimization strategy to the adaptive oscillation suppression device, so that the adaptive oscillation suppression device can suppress the oscillation of the node according to the adjusted adaptive parameters, thereby improving the suppression effect.

[0097] The above are merely embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are included in the scope of the claims of the present invention to be approved.

Claims

1. An adaptive oscillation suppression device, characterized in that: Including device operation layer, data processing layer and application service layer: The equipment operation layer is used to: collect the three-phase AC voltage, three-phase AC current and active power of the node; The data processing layer is used to: calculate the oscillation characteristic quantity of the node and the energy flow power of the node at the oscillation dominant frequency according to the three-phase AC voltage, three-phase AC current and active power of the node; The application service layer is used to: determine the oscillation property of the node according to the energy flow power of the node at the oscillation dominant frequency; The device operation layer is also used to suppress the oscillation of the node according to the oscillation characteristic quantity of the node and the oscillation property of the node.

2. The adaptive oscillation suppression device according to claim 1, characterized in that: The data processing layer is specifically used for: The oscillation characteristic quantity is calculated by using a Prony algorithm; wherein the oscillation characteristic quantity includes at least one of the oscillation frequency, amplitude, phase or damping ratio of the active power.

3. The adaptive oscillation suppression device according to claim 1, characterized in that: The data processing layer is specifically used for: Performing Park transformation on the three-phase AC voltage and the three-phase AC current to obtain voltage components and current components in a two-phase rotating coordinate system; Calculating the transient energy flow of each line in the node according to the voltage component and the current component in the two-phase rotating coordinate system; The energy flow power of the node at the oscillation dominant frequency is calculated according to the transient energy flow.

4. The adaptive oscillation suppression device according to claim 3, characterized in that: The transient energy flow of each line in the node satisfies: Where W represents the transient energy flow of each line in the node, u d represents the d-axis voltage component in the two-phase rotating coordinate system, u q represents the q-axis voltage component in the two-phase rotating coordinate system, i d represents the d-axis current component in the two-phase rotating coordinate system, i q represents the q-axis current component in the two-phase rotating coordinate system, ω0 represents the angular frequency of the power grid, and L g Represents the grid side inductance.

5. The adaptive oscillation suppression device according to claim 4, characterized in that: The data processing layer is specifically used for: The transient energy flows of the lines in the node are superimposed to obtain the energy flow power of the node at the dominant oscillation frequency.

6. The adaptive oscillation suppression device according to claim 3, characterized in that: The application service layer is specifically used for: The energy flow power of the node at the oscillation dominant frequency is positive, and the oscillation property of the node is determined to be an oscillation source node; The energy flow power of the node at the oscillation dominant frequency presents alternating positive and negative, and the oscillation property of the node is determined to be an oscillation propagation path node; The energy flow power of the node at the oscillation dominant frequency is negative, and the oscillation property of the node is determined to be an oscillation receiving node.

7. The adaptive oscillation suppression device according to claim 6, characterized in that: The device operation layer is specifically used for: For the oscillation source node, suppressing oscillation of the oscillation source node according to the maximum output of the adaptive oscillation suppression device; For the oscillation propagation path node, oscillation suppression is performed on the oscillation propagation path node according to the positive and negative fluctuation amplitudes of the energy flow power of the node at the oscillation dominant frequency; For the oscillation receiving node, oscillation suppression is performed on the oscillation receiving node according to the oscillation characteristic amount.

8. A multi-point layout collaborative suppression system, characterized in that: It comprises a station-side cooperative suppression system and a plurality of adaptive oscillation suppression devices as described in any one of claims 1 to 7; Each of the plurality of adaptive oscillation suppression devices is used to: collect the three-phase AC voltage, three-phase AC current and active power of the node, and calculate the oscillation characteristic quantity of the node and the energy flow power of the node at the oscillation dominant frequency according to the three-phase AC voltage, three-phase AC current and active power of the node; The station-side cooperative suppression system is used to: receive the oscillation characteristic quantity of the node and the energy flow power of the node at the oscillation dominant frequency, and send them to other adaptive oscillation suppression devices among the multiple adaptive oscillation suppression devices except itself; Each of the adaptive oscillation suppression devices is also used to: determine the oscillation property of the node according to the energy flow power of the node at the dominant oscillation frequency, and suppress the oscillation of the node according to the oscillation characteristic quantity of the node and the oscillation property of the node.

9. The multi-point layout coordinated suppression system according to claim 8, characterized in that: The station-side collaborative suppression system is also used to: calculate the voltage disturbance amount of the node according to the three-phase AC voltage, calculate the current disturbance amount of the node according to the three-phase AC current, calculate the node power fluctuation amount according to the active power of the node, and calculate the power factor fluctuation amount according to the three-phase AC voltage and the three-phase AC current; calculate the oscillation risk assessment value using the principal component analysis method according to the voltage disturbance amount, the current disturbance amount, the power fluctuation amount and the power factor fluctuation amount; When the oscillation risk assessment value is greater than or equal to a preset assessment threshold value, an oscillation risk warning is issued, and an auxiliary optimization strategy is issued to the adaptive oscillation suppression device; The adaptive oscillation suppression device is further used to: adjust its own adaptive parameters according to the optimization auxiliary strategy, and suppress oscillation of the node according to the adjusted adaptive parameters.

10. A multi-point layout collaborative suppression method, characterized in that: include: Each adaptive oscillation suppression device collects the three-phase AC voltage, three-phase AC current and active power of the node, and calculates the oscillation characteristic quantity of the node and the energy flow power of the node at the dominant frequency of oscillation according to the three-phase AC voltage, three-phase AC current and active power of the node; The station-side cooperative suppression system receives the oscillation characteristic quantity of the node and the energy flow power of the node at the oscillation dominant frequency, and sends them to other adaptive oscillation suppression devices except itself among the multiple adaptive oscillation suppression devices; Each of the adaptive oscillation suppression devices determines the oscillation property of the node according to the energy flow power of the node at the dominant oscillation frequency, and suppresses the oscillation of the node according to the oscillation characteristic quantity of the node and the oscillation property of the node.

11. The multi-point layout coordinated suppression method according to claim 10, characterized in that: The inhibition method further comprises: The station-side collaborative suppression system calculates the voltage disturbance amount of the node according to the three-phase AC voltage, calculates the current disturbance amount of the node according to the three-phase AC current, calculates the power fluctuation amount of the node according to the active power of the node, and calculates the power factor fluctuation amount according to the three-phase AC voltage and the three-phase AC current; calculates the oscillation risk assessment value by using the principal component analysis method according to the voltage disturbance amount, the current disturbance amount, the power fluctuation amount and the power factor fluctuation amount; when the oscillation risk assessment value is greater than or equal to a preset assessment threshold value, performs an oscillation risk warning, and sends an auxiliary optimization strategy to the adaptive oscillation suppression device; The adaptive oscillation suppression device adjusts its own adaptive parameters according to the optimization auxiliary strategy, and suppresses oscillation of the node according to the adjusted adaptive parameters.

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